Turbine Engine Harness Mounting Blocks for Accessible Assembly
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Solution Overview
Problem
The assembly of electrical harnesses to a radial support arm in turbine engines is complex and prone to errors due to the difficulty in accessing fastening screws after the harnesses are set in place, leading to potential pinching, poor positioning, or insufficient tightening.
Innovation Solution
The design includes two independent mounting blocks associated with groups of harness sections, where each mounting block consists of two portions that are connected to the harness sections before assembly on the support wall, allowing for easier assembly and reduced risk of errors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If harnesses are fastened to the fixed structure after passing through openings, then the routing is secured, but accessibility to fastening screws becomes difficult
Solution Approach 1:
The mounting block is divided into three portions that can be assembled in a specific sequence. The first portion is attached to the fixed structure before harness installation, providing accessible fastening points. The second and third portions are assembled afterward, securing the harnesses without requiring difficult accessibility to initial fastening screws.
Solution Approach 2:
The first portion of the mounting block is pre-assembled to the fixed structure before the harnesses are installed. This preliminary action creates accessible fastening points that simplify subsequent assembly operations, allowing workers to easily secure the harnesses without difficult accessibility issues.
2Reliability
If mounting block portions are screwed together and to the fixed structure, then the harnesses are secured, but the assembly becomes complex and error-prone
Solution Approach 1:
The mounting block is segmented into three distinct portions with specific functions. The first portion provides structural attachment to the fixed structure, while the second and third portions secure the harnesses. This segmentation simplifies the assembly process by breaking it into manageable steps with clear sequences, reducing complexity and potential errors.
Solution Approach 2:
The first portion of the mounting block is pre-assembled to the fixed structure before harness installation. This preliminary action establishes a stable base that simplifies subsequent harness securing operations, making the overall assembly process less complex and more reliable.
3Stability of the object's composition
If harnesses are set in place before assembly, then routing is maintained, but poor positioning and insufficient tightening occur
Solution Approach 1:
The mounting block is divided into portions that can be assembled in a specific sequence. The first portion is attached to the fixed structure while harnesses are being routed, allowing for accurate positioning. Subsequent portions are then assembled to secure the harnesses, maintaining both routing stability and positioning precision without the difficulties of tight accessibility.
Data Source
AI summary
An aircraft turbine engine with a main axis includes: an arm that is radial with respect to the main axis, extending through an air flow duct; a support wall belonging to the radial arm and which has two openings; a plurality of electric harnesses extending partially through the radial arm and for which a section of each harness is secured to the support wall of the arm; and two mounting blocks, in which each mounting block is associated with a group of sections of harness.